It's not just one pitch per batter. Marmol cannot say no to his catcher for his entire outing. Bosio implemented the plan when the right-hander returned from the disabled list May 28. How's it going so far?

"I already lost," Marmol said, laughing.

He had to pay up for a couple of shakes in one game, but since then, Marmol is 6-for-6 in save opportunities.

"I do what the catcher says now," he said. "I think it helps a little bit. When I called the pitch, I was thinking too much. When the catcher calls the pitch, it's, 'OK, let's go.' It's a good idea. It's a smart idea from him."

Marmol was 2-for-4 through May 2 in save situations, and Cubs manager Dale Sveum decided to switch to someone else after too many walks. Then, Marmol was sidelined with a hamstring injury. Now, he's got his job back.

"We're trying to simplify things, and it's working," Bosio said. "Sometimes it's more than a grip or a sign or a sequence. I think it's helped his overall mental approach."

Reminded that he's 6-for-6 since doing it Bosio's way, Marmol smiled.

"I better listen," Marmol said. "It works now, and we're going to keep it the same way."